Exam-style question
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A programmer needs a value that is used only while one function performs a calculation. Which choice best matches the contrast between local and global variables?.
- A.Use a local variable because its access is restricted to the relevant part of the program.
- B.Use a global variable because every variable must be accessible everywhere.
- C.Use a global variable because local variables cannot store calculated values.
- D.Use a local variable because local variables are always stored as text.
Model answer
What a good answer should say
- Use a local variable because its access is restricted to the relevant part of the program.
Explanation
Why this works
When a value is needed only in one function, a local variable matches that limited use. The contrast is based on where the variable can be accessed, not on the type of data it stores.
Common mistake
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